I have noticed when i use Adrenalin while gaming, app likes to freeze. After ALT + R closing and opening it works again while. I got bad artifacts when i tried to play 240hz - 144hz. (samsung odyssey g7) Now 120hz works really well.
Have you tried (i think you have) to change those color options 8 - 10 pcb or RGB / YCBR settings.
PS: just checked my settings and for some reason my monitor has changed its hz to 240hz by itself?! Explains little graphical statics etc on hell let loose yesterday.
AMD Ryzen 9 3900X, AM4, 3.8GHz 12-core, G.Skill 16GB (4 x 8GB) Trident Z Neo DDR4 3600MHz, RX 7900 xtx Red Devil, MSI MAG X570 TOMAHAWK WIFI, Seasonic PX-1300 Prime 80 Plus platinum, NZXT krakken Z73 360mm AIO